Platform-wheel.



Patented Sept. 1; 1914.

Q all whomh't'lmag .cohcem Jit-,- known that I, Jorm H. CARR, a citizen of the United States, residing at Al- -ifhambragvinx the county of Los Angeles and -State 1. ofruGalifornia, have invented certain e new and r; useful Improvements in Platform- Wheelspofmwhich,thefollowing is a full,

. olear', :andexact. specification.

' This inventin relates to platform wheels,

ithatis wheels forwagons, traction engines 'and'=other". vehicles employing endless flexible platfoi'ms-zorlmcks on which the Wheels li l move'iand which Prog ess with the W eQ-S, r

reduce thefriction between the wheel and platformior track.

One object of the present invention is to -Anot-her object is" to provide a wheel of I this kind with-,a-cushion or pneumatic tire,

"oertain'extenfi'f p 1 Further "objects will become "'thdescrip'tion"proceeds.

The'inventionwillbe first hereinafter de- T ng Y Wi L h ssp ciificaio specifically in dew Pe c m slmi'lar reference V characters are used therebyrendering same resilient to a apparent as scribed in "con iebtion with the accompany- Y which constitute a part of r and then'set forth more the claims at the end of the 'aconipanying drawings, wherethroughout ,-to,-.r designate corresponding parts-yFigure T is abroken side elevation of one form of wheel constructed in accordance with my inventiofijlfig. 2.is a detailed inner plan View of a portionof the track,.and Fig. is an enlarged transverse section through tlieTriYif brtiOn of a wheel similar to that illustrate in Fig. 1 except that the side plates attached to the shoes are extended slightly to retain a pneumatic or other tire.

In the drawings, 1 designates the wheel properwhich may be of any ordinary construction and provided with a simple fiat tread 2. The endless flexible track or plat form 3, which is somewhat longer than the periphery of the wheel, may comprise a series of shoes 4 hinged together end to end by links 5. Both shoes and links may be of channel iron, the flanges 4 of the shoes embracing the links and adapted to engage it their outer edges the tread of the wheel 1, while the flanges 5 of the links extend outwardly and are adapted to contact with the bases of the shoes when the flanges of PLATFORM-WHEEL.

Specification 0! Letters Patent. q {Application med August 15, 1am.- Serial no. 784,597

, Wilt-1 3 law the latter are in cont the Wheel, as clearly links 5 are made-don" tially meet at their amiss tinuous'track for theft 5 61 to travel on. The hing nect the links to thefshhes the middle of the la- In order to reduce 1. the tread 20f the w eel is desirable to v positivelyreta out of contact with ham the bottom of the whee jFQIjt liIlS I provide flanges orfpla ch lateral flan es 4% of t v v ing inward y as tofh d wheel at the top and" their ends 7 cutat. the tively hold the track w ay, .ro rear and top portions of th K illustrated in- F ig, l a flanges 7-may be secured the shoes by rivets; spacer or filler pieces tween said flanges 7 and vide proper clearancefo sides of the wheel and of the flanges 4F to eii wheel. "In addition 7 tions, the plates 7 serve. pins 6 agalnst working on pins may be riveted at t H 4 desirable to provide ajse ate nection for the flanges artistes-7, .h'ich may be done in the form of links-l0, Fig. 1. The holes 10 are bore-d lai ger"thifii the' rivets 10 so as to provide a loose connection and permit play in case some hard substance ets between the shoes.

As i ustrated in Fig. 3, the plates '7 may be extended, as at 7, beyond the outer faces of the shoes 4 to provide a channel for holding a pneumatic or other tire 11 which may be assed around the track and should besu .ciently larger than said track to allow it to stand away or free from the surfaces of the shoes except at the bottom where the tire assumes a horizontal position to correspond. with the track. The result of this arrangement is'that a long stretch of the tire always lies flat on the ground while the wheel is passing over, and consequently there will be considerably less air-pressure required in the pneumatic tube to support the load rna be than in the ordinary round wheel now in use on trucks and automobiles, because of the much larger surface to sustain the load. Furthermore, this tire will be less liable to puncture and will wear longer than the ordinary tire and less liable to skid or to slide under traction power. My improved form of tire, when'used. on the platform wheel herein disclosed, will also act as a shock absorber, for when the tire strikes an obstacle in the road, the wheel will roll forward and upward on the links 5 which bridge the shoes, and'after passing the obstruction, will resume -its natural position at the bottom or tread. This form of wheel is especially suitable for traveling in loose sand which is to be found in many places and inwhich it is now almost impossible for automobiles and trucks to o.

scribed,=the combination with a rotary member, of an endless track loomly surrounding the same, and comprising a series of shoes hinged together end to end, and side plates attached to said shoes and having their ends cut at an angleto positivel hold the track the rotary 'mem r except at the away from bottom.

2. In a structure of the character described, the combination with a rotary member, of an endless track loosely surrounding the'same, and comprising a series of shoes hinged together end to end, and side plates attached to said shoes and having their ends I .cut at an a away from t e rotary member except at the bottom, and filler pieces interposed between le to positively hold the track the shoes and side' specified.

3. In a structure of the character described, the combination with a rotary member, of an endless track loosely surrounding the same, and comprising a series of shoes hinged together end to end, and side plates attached to said shoes and having their ends cut at an angle to positively hold the track away from the rotary member except at the bottom, and additional links loosely connecting said side plates. 4. In a structure of the character, described, the combination with a rotarymembervof an endless track loosely surrounding the same and consisting of a series of shoes, links, and transverse hinge pins connecting said shoes and links, and side plates attached to the shoes and overlapping the ends of said hinge pins for the purpose specified,said side plates also having their ends out at an angle to positively hold the track away from the rotary member except at the bottom.

plates for the purpose 5.- In a structure of the character described, the combination with arotary mem-- ber, of an endless track loosely surrounding the same, and comprising a series of shoes hinged together end to end, and side plates attached to said shoes and having their ends cut at an angle to positively hold the track away from t e rotary member except'at the bottom, the outer edges of said side plates projecting beyond the shoes, and a resilient tire loose y surrounding the track and arranged in the channel formed by said projecting edges of the side plates and the outer surfaces of the shoes. I

In testimony whereof I have signed my name to this specification in the presence of two attesting witnesses.

v I JOHN H. CARR. Witnesses JAMES C. Knnnnn. R. A. WALKER.

Copies of this patent may be obtained for five cents each, by'addressin: the Commissioner of Iatents.

Washington, D. G. 

